Small chance the child will turn out badly
Now, given that not every person in society is a murderer or a rapist, such an interpretation is absolutely incorrect.
If one-in-1,000 people are murderers (taken, purely for calculation purposes - I think the actual numbers in Ireland are much smaller), then what Dr Walsh actually said was that of this 0.1% of the population, 72% of them would come from a fatherless family.